Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
M
Identifying coordinates of a triangle plotted on a graph.
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5
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2K
khansaheb
K
M
Is this a legitimate geometric proof that the infinite sum of 1/(2^n) = 1?
2
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23
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4K
Mates
M
M
Tile problem: From 3n triangular tiles and 1/2(n - 1)n six-sided tiles, an equilateral triangle can be...
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0
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838
MathIsEverything
M
H
A semi circle, r=1, is bisected by a chord parallel to the base so the segment above the chord is...
2
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24
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4K
BeachBanana
BeachBanana
M
The simplest form of the expression (cot(x) + cos(x))/(1 + cosec(x))
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4
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1K
BeachBanana
BeachBanana
A
"How to calculate the flat part of surface on the sphere" explanations below.
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4
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2K
Dr.Peterson
Dr.Peterson
N
Sum of shaded areas: The area of a rectangle ABCD is 1. Assume E is on the diagonal AC...
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2
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2K
nanase
N
E
Quadrilateral with 2 congruent sides and two other sides not congruent. How do I solve this without Trig?
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3
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1K
stapel
stapel
A
Geometry problem with a limit: Given a parallelogram ABCD with sides AB = 2a, AD = a.
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1
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841
blamocur
blamocur
N
number of shortest paths possible from black triangle to bottom row
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13
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3K
nanase
N
J
Construction layout: Will 2 semicircles with d=28-11/16" fit in wood 48" wide, 96" long?
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7
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1K
blamocur
blamocur
J
Trig sin cos and tan angle circle: tan(4pi/3), cos(11pi/6), sin(5pi/4) in Q1
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8
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2K
Dr.Peterson
Dr.Peterson
L
All of the points in this graph -- (1, 5), (a, 11), (6, b), (8, 19) -- are on the same line
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19
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3K
blamocur
blamocur
G
CNC task. Is it possible to find length with this data?
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5
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1K
gor
G
1
Forces: A joint which is part of a loaded framework carries a vertically downward load of 14kN.
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9
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2K
khansaheb
K
L
a new dilation with center (2,2) sends C to (11,6.5) what is the scale factor? Explain how you know
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5
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2K
blamocur
blamocur
D
Angle of wind required to spin a sphere at a certain speed
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1
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724
blamocur
blamocur
A
How to solve the part between the red lines: Show that the eqn of the locus of the point of....
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1
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769
stapel
stapel
L
determining missing point coordinates using slope
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3
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1K
lu346
L
L
Triangle ABC, with interior pt D, |BD| = log_9(18), |CD| = log_2(18); find length X of AD
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4
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1K
khansaheb
K
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